Umsetzungen der 1.1.3‐Trihalogen‐indene (IV Mitteil.1) über den Ersatz stark positiven Wasserstoffs durch Halogen)

Aromatic polymers made by reductive polydehalogenation of oligocyclic monomers as conjugated polymers of intrinsic microporosity (C-PIMs)

“…The very similar positions of the absorption maxima of P57 at 485 nm and the isolated TBPF chromophore (λ max : 460 nm, see Fig. 3) 21 indicates the dominating presence of alternating twisted TBPF and folded TBHF motifs in P57 as consequence of a very different reactivity of the two different dichloromethylene functions of M57 during the reductive polycondensation, with the higher reactivity most probably for the sterically less stressed -CCl 2units incorporated into 5-membered rings. Hereby, the TBHF building blocks formed in the second condensation step act as efficient conjugation barriers and lead to the presence of isolated TBPF chromophores within the polymer main chain that is composed in an alternating order of TBHF and TBPF units.…”

The Diels-Alder Diene Synthesis.

“…Benzologs of the two above dienes have been studied. Bis-l-indenyl (340) has been shown to add maleic anhydride to give the reduced anhydride (XXVII), and 1 ,V-bidialin (bis-3,4-dihydro-l-naphthyl) likewise gives the reduced anhydride (XXVIII). The bidialin addition does not take place as readily as does the bis-l-cyclohexenyl addition (297, 352).…”